The compact Productivity1000 stackable micro PLC has a 50-MB memory and features four onboard communications ports, including micro USB, serial RS-485, serial RS-232 and Ethernet 10/100Mbps connections. Supported communications protocols include EtherNet/IP, Modbus RTU/TCP and ASCII. The micro USB 2.0 (Type B) port provides a plug-and-play connection for programming, online monitoring and firmware upgrades. The 10/100 Mbps Ethernet port is used for programming, monitoring and firmware upgrades, as well as client/server connections (Modbus TCP, EtherNet/IP scanner and adapters). The CPU’s built-in Web server allows users to view, download and delete data log files from any browser.